World’s Most Polluted Countries

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3. Pakistan

Pollution level: 198 ug/m3

Pakistan’s air pollution is nearly ten times higher than levels considered dangerous by the WHO.

Political instability, corruption and a lack of government measures to curb carbon emissions have led to a cloak of thick smoke over major cities like Karachi, Lahore and Islamabad. In 2008, a government study revealed that every car in Pakistan, regardless of its age, generates 25 percent more carbon than one in the U.S.

Karachi, Pakistan’s biggest city has a capacity for only 700 vehicles per hour, but according to the study, there are more than 11,000 vehicles per hour on the roads. The city, which already has more than half the country’s 3.5 million vehicles, adds up to 400 new cars a day.

Water pollution from raw sewage and industrial waste has also become a major problem in the country. In addition, Pakistan’s water supply is evaporating so quickly that it will become a “water-famine” country by the end of this decade, according to the country’s Centre for Research and Security Studies.